55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
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#include <stdio.h>
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#include <assert.h>
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#include <benchmark/benchmark.h>
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#include "benchmark_png_shared.h"
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#define IMWIDTH 1024
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#define IMHEIGHT 1024
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class png_encode: public benchmark::Fixture {
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private:
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png_dat outpng;
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/* Backing this on the heap is a more realistic benchmark */
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uint8_t *input_img_buf = NULL;
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public:
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/* Let's make the vanilla version have something extremely compressible */
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virtual void init_img(png_bytep img_bytes, size_t width, size_t height) {
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init_compressible(img_bytes, width * height);
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}
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void SetUp(const ::benchmark::State& state) {
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input_img_buf = (uint8_t*)malloc(IMWIDTH * IMHEIGHT * 3);
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outpng.buf = (uint8_t*)malloc(IMWIDTH * IMHEIGHT * 3);
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/* Using malloc rather than zng_alloc so that we can call realloc.
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* IMWIDTH * IMHEIGHT is likely to be more than enough bytes, though,
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* given that a simple run length encoding already pretty much can
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* reduce to this */
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outpng.len = 0;
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outpng.buf_rem = IMWIDTH * IMHEIGHT * 3;
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assert(input_img_buf != NULL);
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assert(outpng.buf != NULL);
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init_img(input_img_buf, IMWIDTH, IMHEIGHT);
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}
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/* State in this circumstance will convey the compression level */
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void Bench(benchmark::State &state) {
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for (auto _ : state) {
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encode_png((png_bytep)input_img_buf, &outpng, state.range(0), IMWIDTH, IMHEIGHT);
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outpng.buf_rem = outpng.len;
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outpng.len = 0;
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}
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}
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void TearDown(const ::benchmark::State &state) {
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free(input_img_buf);
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free(outpng.buf);
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}
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};
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BENCHMARK_DEFINE_F(png_encode, encode_compressible)(benchmark::State &state) {
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Bench(state);
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}
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BENCHMARK_REGISTER_F(png_encode, encode_compressible)->DenseRange(0, 9, 1)->Unit(benchmark::kMicrosecond);
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